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POAccessing application context from TestSuite in Setup() before calling getActivity()
 

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    <p>I have an <code>Activity</code> that pulls an object from an <code>Application</code> extended class (application context) from within the <code>OnCreate()</code> method.</p> <p>When unit testing this activity, the object needed isn't there because it is populated from a previous Activity and stored in the above mentioned application context.</p> <p>Needless to say, when I call <code>getActivity()</code> from within my <code>ActivityInstrumentationTestCase2</code> extended test case I get a null pointer exception.</p> <p>How can I populate the context before an activity is started and have it available to that <code>Activity</code>?</p> <p><strong>Updated:</strong> After a bit of digging I found: <code>this.getInstrumentation().getTargetContext()</code> and then cast it to the type of my <code>Application</code> extended class. But I get a class cast exception and the trace points to this:</p> <pre><code>04-04 21:02:27.036: INFO/TestRunner(431): started: testIt(edu.rockies.rockies.activity.courses.test.TopicTest) 04-04 21:02:27.126: INFO/TestRunner(431): failed: testIt(edu.rockies.rockies.activity.courses.test.TopicTest) 04-04 21:02:27.126: INFO/TestRunner(431): ----- begin exception ----- 04-04 21:02:27.136: INFO/TestRunner(431): java.lang.ClassCastException: android.app.ApplicationContext 04-04 21:02:27.136: INFO/TestRunner(431): at edu.rockies.rockies.activity.courses.test.TopicTest.setUp(TopicTest.java:27) 04-04 21:02:27.136: INFO/TestRunner(431): at junit.framework.TestCase.runBare(TestCase.java:125) 04-04 21:02:27.136: INFO/TestRunner(431): at junit.framework.TestResult$1.protect(TestResult.java:106) 04-04 21:02:27.136: INFO/TestRunner(431): at junit.framework.TestResult.runProtected(TestResult.java:124) 04-04 21:02:27.136: INFO/TestRunner(431): at junit.framework.TestResult.run(TestResult.java:109) 04-04 21:02:27.136: INFO/TestRunner(431): at junit.framework.TestCase.run(TestCase.java:118) 04-04 21:02:27.136: INFO/TestRunner(431): at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:169) 04-04 21:02:27.136: INFO/TestRunner(431): at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:154) 04-04 21:02:27.136: INFO/TestRunner(431): at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:430) 04-04 21:02:27.136: INFO/TestRunner(431): at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1447) 04-04 21:02:27.136: INFO/TestRunner(431): ----- end exception ----- 04-04 21:02:27.156: INFO/TestRunner(431): finished: testIt(edu.rockies.rockies.activity.courses.test.TopicTest) </code></pre> <p><code>this.getInstrumentation().getTargetContext()</code> is supposed to return an object of type context. But I get the <code>android.app.ApplicationContext</code> class cast exeption which doesn't make sense.</p> <p><strong>Update 2:</strong></p> <p>I did some more research and discovered this for <a href="http://www.androidjavadoc.com/m3-rc37a/index.html?android/app/Application.html" rel="noreferrer">android.app.Application</a></p> <pre><code>java.lang.Object android.content.Context android.app.ApplicationContext android.app.Application </code></pre> <p>But Google's own Android Javadoc refers to <a href="http://developer.android.com/reference/android/app/Application.html" rel="noreferrer">this</a>:</p> <pre><code>java.lang.Object android.content.Context android.content.ContextWrapper android.app.Application </code></pre> <p>What's going on? Something's not right.</p> <p><strong>Update 3:</strong></p> <p>I have replaced the following line of code:</p> <pre><code>this.getInstrumentation().getTargetContext(); </code></pre> <p>with this line of code. </p> <pre><code>this.getInstrumentation().getTargetContext().getApplicationContext(); </code></pre> <p>Although the context resolves properly, it doesn't seem to be the same context as the activity's.</p>
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    1. CODid you try calling `getActivity().getApplication()`?
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    2. COI can't because the activity's OnCreate() method depends on data being in the context already. Calling getActivity() essentially calls the OnCreate() method which fails and thus generates a Null Pointer Exception. Hence my dilemma.
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      1. USSalsero69
    3. COOk, my tests are running fine this morning. Not sure what's changed, but the latest update above (Update 3) seems to have resolved the issue.
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